import logging
import time
import random
from datetime import datetime, timedelta

class DeviceController:
    def __init__(self, config):
        self.config = config
        self.logger = logging.getLogger('DeviceController')
        self.ptz_status = {
            "pan": 0,
            "tilt": 0,
            "zoom": 1.0
        }
    
    def ptz_control(self, channel_id, command):
        """PTZ控制（伪实现）"""
        self.logger.info(f"执行PTZ命令: {command} on {channel_id}")
        
        # 解析命令 (示例: A50F01)
        # 实际实现需要解析GB28181 PTZ命令格式
        try:
            # 伪操作：更新PTZ状态
            if 'up' in command.lower():
                self.ptz_status["tilt"] += 5
            elif 'down' in command.lower():
                self.ptz_status["tilt"] -= 5
            elif 'left' in command.lower():
                self.ptz_status["pan"] -= 5
            elif 'right' in command.lower():
                self.ptz_status["pan"] += 5
            elif 'zoomin' in command.lower():
                self.ptz_status["zoom"] += 0.1
            elif 'zoomout' in command.lower():
                self.ptz_status["zoom"] -= 0.1
                
            self.logger.info(f"新PTZ状态: Pan={self.ptz_status['pan']}, Tilt={self.ptz_status['tilt']}, Zoom={self.ptz_status['zoom']}")
            return True
        except:
            return False
    
    def get_record_list(self, channel_id, start_time, end_time):
        """获取录像列表（伪实现）"""
        self.logger.info(f"查询录像: {channel_id} {start_time} to {end_time}")
        
        # 生成伪录像记录
        records = []
        start = datetime.strptime(start_time, "%Y-%m-%dT%H:%M:%S")
        end = datetime.strptime(end_time, "%Y-%m-%dT%H:%M:%S")
        
        current = start
        while current < end:
            record_end = current + timedelta(minutes=30)
            if record_end > end:
                record_end = end
                
            records.append({
                "name": f"Record_{current.strftime('%Y%m%d%H%M')}",
                "path": f"/records/{channel_id}/{current.strftime('%Y%m%d')}.mp4",
                "address": "Camera Location",
                "start": current.strftime("%Y-%m-%dT%H:%M:%S"),
                "end": record_end.strftime("%Y-%m-%dT%H:%M:%S")
            })
            
            current = record_end + timedelta(minutes=5)
            
        return records
    
    def start_broadcast(self, channel_id):
        """启动语音广播（伪实现）"""
        self.logger.info(f"在通道 {channel_id} 上启动语音广播")
        # 伪代码：实际实现需要启动音频流
        
    def trigger_alarm(self, channel_id, alarm_type, description):
        """触发报警（伪实现）"""
        self.logger.warning(f"触发报警: {alarm_type} - {description}")
        # 实际实现中这里会连接真实传感器
        return True